<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item><a href="/goods">商品管理</a></el-breadcrumb-item>
            <el-breadcrumb-item :to="{ path: '/goods' }">商品列表</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 提示区域 -->
            <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
            <!-- 步骤条 -->
            <el-steps :active="activeIndex" align-center finish-status="success" :space="200">
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
            <!-- 表单内容区域 -->
            <el-form ref="editFormRef" label-width="100px" label-position="top" :model="editForm"
                :rules="editFormRules">
                <!-- tab标签页区域:左侧tab选线 -->
                <el-tabs v-model="activeIndex" tab-position="left" @tab-click="handleTabClick"
                    :before-leave="beforeLeaveHandler">
                    <el-tab-pane label="基本信息" :name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="editForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model.number="editForm.goods_price"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="editForm.goods_weight" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="editForm.goods_number" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类" prop="goods_cat">
                            <!-- 选择商品分类的级联选择框 -->
                            <el-cascader ref="cateHandle" v-model="selectedKeys" :options="parentCateList"
                                :props="cascaderProps" @change="parentCateChange" clearable
                                change-on-select></el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" :name="1">
                        <template v-if="manyTableData.length">
                            <!-- 渲染表单的item项 -->
                            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                                <!-- 复选框组 -->
                                <el-checkbox-group v-model="item.attr_vals_arr">
                                    <el-checkbox :label="cb" :value="cb" v-for="(cb, i) in item.attr_vals"
                                        :key="i"></el-checkbox>
                                </el-checkbox-group>
                            </el-form-item>
                        </template>
                        <div v-else>暂无参数数据</div>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" :name="2">
                        <template v-if="onlyTableData.length">
                            <!-- 渲染表单的item项 -->
                            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                                <!-- 下拉框组 -->
                                <el-select v-if="item.attr_vals.length > 1" v-model="item.attr_vals_arr" size="large"
                                    style="width: 240px">
                                    <el-option v-for="(cb, i) in item.attr_vals" :key="i" :label="cb" :value="cb" />
                                </el-select>
                                <el-input v-else v-model="item.attr_vals_arr"></el-input>
                            </el-form-item>
                        </template>
                        <div v-else>暂无参数数据</div>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" :name="3">
                        <!-- action:图片上传的后台api接口 -->
                        <!-- list-type="picture":预览图片的效果 -->
                        <!-- headers:添加请求头部，手动添加请求头部，保存到data中 -->
                        <el-upload v-model:file-list="fileList" list-type="picture-card" :headers="headers"
                            class="avatar-uploader" name="file" :action="`${baseURL}/upload`" :show-file-list="true"
                            :on-success="handleAvatarSuccess" :on-remove="handleRemove"
                            :on-preview="handlePictureCardPreview" :before-upload="handleBeforeUpload" multiple
                            :on-change="handleChange">
                            <el-icon class="avatar-uploader-icon">
                                <Plus />
                            </el-icon>
                        </el-upload>
                        <!-- 图片预览 -->
                        <el-dialog v-model="dialogVisible">
                            <img class="previewImg" w-full :src="dialogImageUrl" alt="Preview Image" />
                        </el-dialog>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" :name="4">
                        <div style="border: 1px solid #ccc">
                            <Toolbar style="border-bottom: 1px solid #ccc" :editor="editorRef"
                                :defaultConfig="toolbarConfig" :mode="mode" />
                            <Editor style="min-height: 500px; overflow-y: hidden" v-model="goods_introduce"
                                :defaultConfig="editorConfig" :mode="mode" @onCreated="handleCreated" />
                        </div>
                        <el-button type="primary" class="btnAdd" @click="addGoods">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
        </el-card>
    </div>
</template>

<script setup>
import { ref, computed, onBeforeUnmount, shallowRef, onMounted } from 'vue'
import { getCateListApi } from '@/api/cate'
import { getAttrListApi } from '@/api/params'
import { addGoodsApi } from '@/api/goods'
import { message } from '@/utils/functions'
import { baseURL } from '@/utils/request'
import { Plus } from '@element-plus/icons-vue'
//========================================================
//在线文本编辑器
import { Editor } from '@wangeditor/editor-for-vue'
import { Toolbar } from '@wangeditor/editor-for-vue'
import '@wangeditor/editor/dist/css/style.css'
//pinia中获取token
import { useUserStore } from '@/stores/user'
const userStore = useUserStore()
const router = useRouter()
const token = userStore.token
import { useRoute } from 'vue-router'
import { useRouter } from 'vue-router'

const headers = {
    Authorization: token
}


// 编辑器实例，必须用 shallowRef
const editorRef = ref()
// 内容 HTML
const goods_introduce = ref('')
// 工具栏的配置
const toolbarConfig = {}
// 编辑器的配置
const editorConfig = {
    placeholder: '请输入内容...',
    MENU_CONF: {
        // 文件上传相关的配置
        uploadImage: {
            base64LimitSize: 5 * 1024, // 5kb
            server: `${baseURL}/upload`,
            headers: {
                Authorization: token
            },
            fieldName: 'file',
            // 自定义上传
            async customUpload(file, insertFn) {
                const url = URL.createObjectURL(file)
                // 最后插入图片
                insertFn(url)
            }
        }
    }
}
// 模式
const mode = ref('simple')

// 组件销毁时，也及时销毁编辑器
onBeforeUnmount(() => {
    const editor = editorRef.value
    if (editor == null) return
    editor.destroy()
})

const handleCreated = editor => {
    editorRef.value = editor // 记录 editor 实例，重要！
}

// 步骤条激活的索引
// tab选项卡激活的选项
const activeIndex = ref(0)
// 定义表单数据项
const editForm = ref({
    goods_name: '',
    goods_price: 0,
    goods_weight: 0,
    goods_number: 0,
    // 商品所属的分类id
    goods_cat: ''
})
//  商品的表单数据验证规则
const editFormRules = ref({
    goods_name: [
        { required: true, message: '请输入商品名称', trigger: 'blur' },
        {
            min: 2,
            max: 30,
            message: '商品名称的长度在2-30个字符之间',
            trigger: 'blur'
        }
    ],
    goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
    goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
    goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
    goods_cat: [{ required: true, message: '请选择商品分类', trigger: 'blur' }]
})

// 级联菜单相关
// 分类数据
const parentCateList = ref([])
// 级联菜单选中项的值（每个下拉选项的value值的数组）
const selectedKeys = ref([1, 3, 6])
// 配置级联菜单中数据如何展示
const cascaderProps = ref({
    // 当要展示的下拉选项的数据的属性不是value和label时，需要配置该属性
    value: 'cat_id',
    label: 'cat_name',
    // 多级的数据的关联关系字段不是children时需要配置该属性
    children: 'children',
    // 默认情况下，级联菜单的选项是点击触发的，如果需要hover触发，需要配置该属性
    expandTrigger: 'hover',
    // 设置父子节点取消选中关联，从而达到选择任意一级选项的目的
    checkStrictly: true
})

// 获取所有分类数据
const getparentCateList = async () => {
    const data = await getCateListApi({ type: 3 })
    parentCateList.value = data
}
getparentCateList()
// 组件对象
const cateHandle = ref(null)
const parentCateChange = () => {
    if (selectedKeys.value === undefined) {
        // 分类id变成空字符串
        editForm.value.goods_cat = ''
        return
    }
    // 只允许选择三级分类作为参数所属的分类
    if (selectedKeys.value.length !== 3) {
        // 清空选中项
        selectedKeys.value = []
        // 分类id变成空字符串
        editForm.value.goods_cat = ''
        // 选中了父级后，让级联菜单隐藏
        cateHandle.value.togglePopperVisible(false)
        return
    }
    // 选中了父级后
    // 将选中的三级分类的id拼接成字符串
    editForm.value.goods_cat = selectedKeys.value.join(',')
    // 让级联菜单隐藏
    cateHandle.value.togglePopperVisible(false)
}

// 分类id
const cat_id = computed(() => {
    if (selectedKeys.value === undefined) {
        return ''
    }
    return selectedKeys.value.length ? selectedKeys.value[selectedKeys.value.length - 1] : ''
})

// 动态参数数据
const manyTableData = ref([])
// 获取静态参数数据
const onlyTableData = ref([])
// 根据分类id和类型获取参数数据
const getParamsData = async (cat_id, type) => {
    // 获取动态参数数据
    if (type === 'many') {
        const data = await getAttrListApi(cat_id, 'many')
        // 处理数据
        data.forEach(item => {
            // attr_vals是字符串，需要转换为数组
            item.attr_vals = item.attr_vals.split(',')
            // 用来收集复选框组选中的值
            item.attr_vals_arr = []
        })
        manyTableData.value = data
    } else {
        // 获取静态参数数据
        const data = await getAttrListApi(cat_id, 'only')
        // 处理数据
        data.forEach(item => {
            // attr_vals是字符串，需要转换为数组
            item.attr_vals = item.attr_vals.split(',')
            if (item.attr_vals.length === 1) {
                item.attr_vals_arr = item.attr_vals[0]
            } else {
                item.attr_vals_arr = item.attr_vals[0]
            }
        })
        onlyTableData.value = data
    }
}

// 切换选项卡时触发的事件
const handleTabClick = async tab => {
    if (activeIndex.value === 1) {
        await getParamsData(cat_id.value, 'many')
    } else if (activeIndex.value === 2) {
        await getParamsData(cat_id.value, 'only')
    }
}

// tabs切换控制
const beforeLeaveHandler = (activeName, old) => {
    if (activeName !== 0 && cat_id.value === '') {
        message('error', '请先选择三级分类菜单')
        return false
    }
    // 更改选项卡的索引
    activeIndex.value = activeName
    return true
}

// 上传图片

// 最终存储图片的数据
const fileList = ref([])

const handleAvatarSuccess = (response, uploadFile, uploadFiles) => {
    if (response.meta.status === 200) {
        // 因为每次只上传一张图片，先置空原数组
        // fileList.value.length = 0
        // 添加图片数据
        fileList.value = uploadFiles.map(item => {
            return {
                name: item.name,
                tmp: item.response.data.tmp_path,
                url: item.response.data.url
            }
        })
    }
}
// 图片预览
const dialogImageUrl = ref('')
const dialogVisible = ref(false)

// 图片删除的处理
const handleRemove = (uploadFile, uploadFiles) => {
    // 多张图片，就删除当前要删除的这张
    fileList.value = uploadFiles.map(item => {
        return {
            name: item.name,
            tmp: item.tmp_path,
            url: item.url
        }
    })
}
// 图片预览
const handlePictureCardPreview = file => {
    dialogImageUrl.value = file.url
    dialogVisible.value = true
}

// 图片上传前的验证
const handleBeforeUpload = file => {
    // 定义上传文件的类型只能是图片格式
    const allowMineType = ['image/jpeg', 'image/png', 'image/gif', 'image/bmp']
    // 定义图片大小不能超过2M
    const isLt2M = file.size / 1024 / 1024 < 2
    if (!allowMineType.includes(file.type)) {
        message('error', '只能上传图片格式文件!')
        return false
    }
    if (!isLt2M) {
        message('error', '上传头像图片大小不能超过 2MB!')
        return false
    }
    return true
}
const handleChange = () => {
    // fileList.value = []
}


// 商品添加
const addGoods = async () => {
    try {
        // 触发表单验证
        // await editorRef.value.validate();《==================不需要进行表单验证，函数也未定义

        // 定义一个新的对象来收集接口需要的数据
        const formData = Object.assign({}, editForm.value);
        // 获取图片地址
        formData.pics = fileList.value.map(item => ({
            pic: item.tmp
        }));
        // 获取动态参数数据
        formData.attrs = [];
        manyTableData.value.forEach(item => {
            // 收集复选框选中的数据
            item.attr_vals_arr.forEach(val => {
                formData.attrs.push({
                    attr_id: item.attr_id,
                    attr_value: val
                });
            });
        });
        // 获取静态参数数据
        onlyTableData.value.forEach(item => {
            formData.attrs.push({
                attr_id: item.attr_id,
                attr_value: item.attr_vals_arr
            });
        });
        // 在线文本编辑器的内容
        formData.goods_introduce = goods_introduce.value;
        // 添加商品
        await addGoodsApi(formData);
        message('success', '添加商品成功');
        activeIndex.value = 5;
        router.push('/goods');
    } catch (error) {
        // console.error('表单验证失败或API请求失败:', error);
        // message('error', '添加商品失败');
        console.log(error );
        
    }
}


</script>


<style lang="scss" scoped>
// 图片上传区域配置
.avatar-uploader {
    :deep(.el-upload) {
        margin: 0 50px;
        width: 148px;
        height: 148px;

        .el-upload-dragger {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 100%;
            height: 100%;
        }

        .el-icon.avatar-uploader-icon {
            font-size: 28px;
            color: #8c939d;
            width: 148px;
            height: 148px;
            text-align: center;
        }
    }
}

// 图片预览，图片大小
.previewImg {
    width: 100%;
    height: 100%;
}

// wangEditor 编辑器配置
:deep(.w-e-text-container) {
    .w-e-scroll {
        height: 500px;
    }
}

// 商品添加按钮样式
.btnAdd {
    margin-top: 15px;
}
</style>